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Loans and Allowance for Loan Losses (Details 1)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Loans and Leases Receivable, Related Parties [Roll Forward]  
Balance at December 31, 2016 $ 3,273
New loans and new directors 3,419
Amounts collected (250)
Balance at December 31, 2017 $ 6,442